Motor-mounting for piano-players.



C. FRBORG.

MOTOR MOUNTING FOR PIANO PLAYERS,

APPLICATION FxLED sEPT.4.1915.

1,267,536, Patented May 28,1918.

CHARLES FREBORG, OIE KANKAKEE, ILLINOIS, ASSIG-NOR TO PRICE TEEPLE PIANO COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

MOTOR-MOUNTING FOR PIAN'O-IELAIER'S.l

Specification of Letters Patent.

Patented May as, 191s.

Appncation ined september 4, 1915. serial No. 48,573.

To all fwhom t may concern.'

Be it known that I, CHARLES FREBORG, a citizen of the United States, residing at. Kankakee, in the county of Kankakee and State of Illinois, have invented certain new and useful Improvements in Motor-Mountings for Piano-Players, of which the following is a specification.

This invention relates to improvements in motor. mountings for player pianos, or the like.

It has been found thatin the construction and use of player pianos actuated by an electric motor, for example, the vibrations and noises resulting from the 4operation of the motor are such as to seriously interfere with the satisfactory reproduction of the music.

The object of my invention is so to mount the electric motor that it will eliminate this and other disadvantages. f

Still another object is to provide a mounting for the operating motor, which consists of flexible members, together with means for varying the tension of such members.

Still another object is to provide in connection with a mounting of the kind described above means for deadening the vibrations which might be transmitted from the frame to the motor casing.

These and other objects will be set forth and described in the following specification, taken in connection with the accompanying drawings, in whichy Figure 1 is a front elevation of a portion of a player piano showing my invention applied thereto.

Fig. 2 is a vertical section through a por tion of the motor casing and frame.

Fig. 3 is a perspective, partially1 in section,

4Q of the motor-supporting means proper.

' F ig,l 4 is a detail of the motor-supporting frame and cable, and

\ Fig. 'is similar to Fig. 2, taken at right -'angles thereto.

Like numerals refer to like elements throughout the drawings, in whichl0 designates generally a player piano, 1n

Athe base of which I have arranged a casing v11, open at the front, as shown in Fig, 1. In this casing I mount an air-exhausting bellows ii, connected by straps 12a to an eccentric 13 on the operating shaft 14, the

' latter being jonrnaled in the bracket 15. A

pulley 16J is also secured to the shaft 14. A partition 17 of galvanized metal, or the like,

extends across to the sides of the casing, so as to form the lower portion of the motor compartment 11. A pair of cleats 11b extend from the front to the back of the sides of the casing 11, and are located slightly above the bottom thereof, as shown in Fig. 1. These cleats provide a guide for the motorsupporting means 18, shown in perspective, for example, in Fig. 3., This means comprises a .frame formed. of the sides 18a, back 18h, front 18, and cross plate 18d. The back and sides are secured together, while the front is tongued a't 1'8e at its ends to slide in grooves 18f in the sides 18a. The cross plate extends across between, and is secured to the ends of the sides. Rotatable screws 19 pass through the plate 18fl and engage the front strip 18C. It will bel apparent that the proper rotation of the screws 19 will result in the moving in or out of the front strip 18.

Cables or rope members 20 extend between the front and back-strips 18, 18h, being formed preferably in Aan endless band, having portions thereof extending through andy embedded in such strips, as is clearly shown in Fig. 3. Strips of felt 22 are secured to the back and side stripsv18, 18b for a purpose to be hereinafter described. The electric operating motor.y is indicated by the numeral 25, and rests upon; the cables 20 inside the frame, as Ishown-ain Figs. 2 and 5, and is secured thereto byV a'clamping plate 25a n suitably grooved to. accommodate the cables 20-see Fig. 5. 'Suitable strips of felt, .or the like, indicated by the numerals-27, are provided at the Abottom ofthe cleats 11" and the bottom of the casing shown' in Fig. 5.

lVhen the device is assembled, the frame 18, carrying theymotor 25, is slid into position, as shown vin Figs. '151, and 2, and the belt 28 is fitted'y around the driving pulley 25b and the drivenpulley 16. When assembled, operation of, the motor will not result in these vibrations being transmitted to the motor easing or piano, since the flexibility of the cable sections eliminates such transmission to a great extent, and the interposition of the strips'of felt, 22 and 27, further deadens any such vibrations as might be so transmitted. If the tension of the belt 28 is slack, it may be tightened by loosening screws 19, thus allowing the cable portionsto sag more, and, similarly, ifthe tension be too great, or should the cables have sagged too much, the latter' may be adjusted by utilizing the screws 19 and cross strip 18d. `When it is desired to remove or inspect the motor for any reason, it is only necessary to slip 0E the belt 28 and draw the frame 18 from the position shown in Fig. l, while if removal of the .motor is desired, it is only necessary to remove the clamping plate 25a to obtain such result.

lt willv be apparent from the above that my structure accomplishes all of the advantages set forth in the preamble hereto; and it will also be obvious that it is susceptible of many modiiications and' changes, and l do not therefore wish to be restricted to theorm described and shown beyond the scope of the appended claims.

What i claim is l. In combination with a motor, a supporting.) member comprising a iexible cross member secured at its'ends, said motor being; secured to said cross member.

2. in combination with a motor, a supporting member comprising a flexible cross member secured at its ends, said motor being secured to said cross member, and means vto vary the iiexibility of said cross member.

Laer/,eac

extending between the sides of said frame, said motor being secured to said cables, and means to vary the tension in said cables.

`6. In combination with a motor, a supporting member comprising a frame, flexible supporting means carried by said frame,`

said motor being secured to said means, supporting means Afor said frame and motor, and deadening means located between said frame and supporting means.

7. ln combination with a motor, a supporting member comprising a frame, flexible supporting means carried by said frame, said motor being secured to said means, supporting means for said frame and motor, and deadening strips of felt located between said trame and supporting means.

8.111 combination with a motor, a supporting means therefor comprising a frame, cables-extending between the sides of said frame and attached thereto, and means to vary the relative position of one of said sides to thereby vary the tension in said cables.

9. ln combination with a motor, a supporting means therefor comprising a frame, supporting cables extending between the sides of said frame, and means to secure said motor to said cables, said means comprising a detachable clamping plate.

ln testimony whereof, l have subscribed my name.

CHARLES FR'EBORG.

'Witnessesz WM. Plane, Samira ANDERSON. 

